Principle
The greenhouse effect in the solar collector works not only for
the better heat insulation of the solar collector, but also for its
protection from the external influences of the weather. The heating
is not significantly influenced by the plexiglass disc, but the
collector clearly cools down slower. Therefore, the disc has also
the function that - in case of clouds - the water does not cool so
strongly down in the solar collector, thus losses are
minimized.
The disk helps to slow down the cooling process in case that
ambient conditions change (clouds) it keeps the temperature of the
water, thus minimising losses.
Benefits
- Experiment is part of a complete solution set with a total of
17 experiments for Renewable Energy Basics and Heat energy
- Safe experimentation: the lamp is protected against touch, the
housing is well ventilated with the aid of holes and is only
slightly heated
- Stable setup by using the optical bench
Tasks
- How can the greenhouse effect be used?
- In these experiments, the effects of a plexiglass disc fixed at
the solar collector, are to be observed and compared to the solar
collector without disc. For this purpose the temperature gradation
of the absorber plates (of the solar collector) will be examined
with and without plexiglass disc during the heating up and the
subsequent cooling.
What you can learn about
- Greenhouse effect
- Solar collector
- Heat insulation
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